The research also includes a literature review and site visits to selected agencies. The 21 agencies included State, county, and private organizations. Results showed that the passive or active monitoring systems are typically used at one or more of three stages in the juvenile justice process: (1) predispositional detention, (2) the postdispositional stage, and (3) postcommitment. Findings also showed that electronic monitoring can be effective when used in conjunction with good correctional practices, enhanced intensive supervision, or home confinement services and when used to supplement rather than substitute for face-to-face contact. When these conditions are met, electronic monitoring programs can reduce the use of detention facilities, correctional institutions, and other out-of-home placements by allowing youth to remain at home while addressing concerns about public safety by providing effective home supervision. Tables, appended instruments and list of agencies surveyed, 6 references, and bibliography listing 25 references